It's certainly possible. I've handled a bunch of bug bounty programs and sometimes submissions come in at just the right time and attract just the right attention. It's not a reasonable expectation for the average submission.

It depends on your targets, IME. Huge companies? Yep, you'll get a "thanks for telling us" from a bigger bug bounty program and then not hear anything for weeks to months.

For small- and mid-sized companies that do bug bounties (of which there seem to be fewer and fewer these days as a percentage) you can definitely wind up submitting directly to the right people and get really quick response times.